Re:42 is found to be the sum of three cubes
by zodiac on Friday September 06, 2019 @05:40PM
(#20900171)
Oops:
Every cube is within one of a multiple of nine, which means every sum of three cubes is within three of a multiple of nine. So numbers of the form 9k+4 or 9k+5 cannot be expressed as the sum of three cubes.
It’s conjectured that every other whole number can be.
Every cube is within one of a multiple of nine, which means every sum of three cubes is within three of a multiple of nine. So numbers of the form 9k+4 or 9k+5 cannot be expressed as the sum of three cubes.
It’s conjectured that every other whole number can be.
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